The B.M. Allen House is a brick I-house of transitional Greek Revival/​Italianate style, with Gothic Revival elements. ​ The front door, lighted with a tall transom, is surrounded with a crossette architrave. The three-bay front porch sports a parapet pierced with pointed arches. ​ A two-story ell abuts the north end of the main block; along its south face is a recessed double gallery, now enclosed. Six frame outbuildings,​ including two barns, enhance the property'​s significance. ​

The B.M. Allen House is a brick I-house of transitional Greek Revival/​Italianate style, with Gothic Revival elements. ​ The front door, lighted with a tall transom, is surrounded with a crossette architrave. The three-bay front porch sports a parapet pierced with pointed arches. ​ A two-story ell abuts the north end of the main block; along its south face is a recessed double gallery, now enclosed. Six frame outbuildings,​ including two barns, enhance the property'​s significance. ​